The correct sequence of plants in a hydrosere is
Oak → Lantana → scirpus→Pistia→Hydrilla→Volvox
Volvox → Hydrilla → Pistia → Scirpus → Lantana → Oak
Pista → Volvox → Scirpus → Hydrilla → Oak → Lantana
Pista → Volvox → Scirpus → Hydrilla → Oak → Lantana
B.
Volvox → Hydrilla → Pistia → Scirpus → Lantana → Oak
The various stages in a hydrosere are well studied in ponds. Pools or lakes. The various stages of hydrosere are:
Phytoplankton stage, eg, some blue-green algae, green algae (volvox), diatoms and bacteria, etc.
Rooted submerged stage, eg Hydrilla Vallisneria, etc.
Floating stage, eg, Nelumbo, Nymphaea, etc. Some free-floating species are pisita, Azolla, Lemna, etc.
Red -swamp stage, eg, species of Cyperaceae and Gramineae.
Forest stage, eg, Tropical rain forests, mixed forests of Almus, Acer, Quercus (oak), tropical deciduous forests.
Which one of the following pairs of food components in humans reaches the stomach totally undigested?
Protein and starch
Starch and fat
Fat and cellulose
Fat and cellulose
Stroma in the chloroplasts of higher plants contains
light -independent reaction enzymes
Light -dependent reaction enzymes
ribosomes
ribosomes
A change in the amount of yolk and its distribution in the egg will effect
formation of a zygote
the pattern of cleavage
number of blastomeres produced
number of blastomeres produced
Uric acid is the chief nitrogenous component of the excretory products of
man
earthworm
cockroach
cockroach
The epithelial tissue present on the inner surface of bronchioles and fallopian tubes is
cuboidal
glandular
ciliated
ciliated
Which one onf the following groups of animals is bilaterally symmetrical and triploblastic?
Coelenterates (cnidarians)
Aschelminthes (roundworms)
ctenophores
ctenophores
Which one of the following has haplontic life cycle?
Funaria
Polytrichum
fully developed foetus and placenta
fully developed foetus and placenta
